350 UTRICULARIA MONTANA. [Cmar. XVIII. 
do not bifurcate and extend up the dorsal and ventral 
surfaces, as in the previous species. 
The antennæ are of moderate length, and taper to a fine 
point; they differ conspicuously from those before described, 
in not being armed with bristles. Their bases are so 
abruptly curved that their tips generally rest one on each 
side of the middle of the bladder, but sometimes near the 
margin. Their curved bases thus form a roof over the cavity 
in which the valve lies; but there is always left on each 
side a little circular passage into the cavity, as may be seen 
Fig. 27. 
(Utricularia montana.) 
Bladder; about 27 times enlarged. 
in the drawing, as well as a narrow passage between the 
bases of the two antennz. As the bladders are subterranean, 
had it not been for the roof, the cavity in which the valve 
lies would have been liable to be blocked up with earth and 
rubbish; so that the curvature of the antenns is a service- 
able character. There are no bristles on the outside of the 
collar or peristome, as in the foregoing species. 
The valve is small and steeply inclined, with its free pos- 
terior edge abutting against a semicircular, deeply depending 
